Ac purchased a brand new Dell laptop pre-loaded with Ubuntu, Dell Latitude 3410. After he booted it up and finished the setup with his login, when he tried the headphone jack, it did not work. The sound stopped coming out of the speakers, but no sound from the headphones.
At first, I wondered if it was a hardware fault. Then found that this is a known problem with these laptops as seen on Dell's help forum -
https://www.dell.com/community/Latitude/Latitude-3410-and-3510-Audio-Jack-Problem/td-p/7659856
Since the above solution, of installing the Dell Optimizer app, is for Windows, googling for help on Linux, found these two posts.
https://askubuntu.com/questions/1291829/no-audio-on-dell-latitude-3410-with-ubuntu-20
https://forums.linuxmint.com/
This second one worked - the solution was to comment out the line which automatically suspends "sinks/sources that become idle for too long"
in /etc/pulse/default.pa
### Automatically suspend sinks/sources that become idle for too long
#load-module module-suspend-on-idle
And then reboot. After the reboot, manually choosing the audio as headset and manually disabling the speakers output using the pulseaudio sound control app gives us the desired outcome.
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